the quality requirement is very high on expressway soft foundation improvement compared to the super pre-loading and the jet-powder pile, the vacuum-heaped load combining pre-compression is cheaper and its intensify effect is distinct 高速公路軟基處理質(zhì)量要求高,與傳統(tǒng)等超載預(yù)壓和粉噴樁加固軟基相比,真空堆載聯(lián)合預(yù)壓加固效果明顯,費(fèi)用低。